freiform wrote: That is a great project! I am considering building a hat with at least 4 12V outputs for my gear. I though that would be something that's available commercially, but apparently not.

jnowat wrote: Perhaps the biggest spec for me on this board is the 12V input to the hat- it powers the Pi, correct? Heck. YES. Much needed. Who has time for 5V when you're mobile? Too much struggle, imo.

That could be easily solved with a 12V USB hub. That's what I use to have a single 12V line as the only cable running up the mount.

No need for such complexity! AstroHAT directly powers the RPi4 appropriately and with the right protections in place.